第三次課文翻譯

Find out what is known about the problem.
(找出關於問題已知的資料)
Bormann and Likens searched the scientific literature to find out
what was known about the retention and loss of water and soil nutrients in forests.
(鮑爾曼和Likens在科學文獻搜尋有關森林的水和土壤養分保留和損失的資料)
Ask a question to be investigated.
(提出一個問題進行研究調查)
The scientists asked:"How does clearing forested land affect its
ability to store water and retain soil nutrients?
(科學家們問道：“如何結算林地影響其蓄水能力和保持土壤養分？)
Design an experiment to answer the question and collect data.
(設計一個實驗來回答這個問題，並收集數據。)
To collect data,or information needed to answer their questions,
(收集所需要的數據或資料來回答他們的問題，
scientists often conduct experiments,or procedures carried out
under controlled conditions to gather information and test ideas.
科學家經常進行實驗，或在條件程序下收集資料和測試想法。)
Bormann and Likens collected and analyzed data on the water and soil nutrients
flowing from a patch of an undisturbed forest and from a nearby patch of forest which they had cleared of trees for their experiment.
(在Bormann and Likens的實驗，他們從一小塊原始森林和一小塊被砍除森林的土地，收集並且分析水和土壤養分的流動數據。)
Propose an hypothesis to explain the data.
(提出一種假說來解釋數據。)
Scientists suggest a scientific hypothesis,or possible explanation of what they observe in nature.
(科學家們建議一個假說或可能的解釋來自他們所觀察到的本質。)
The data collected by Bormann and Likens showed a decrease in the ability of a cleared forest to store water and retain soil nutrients such as nitrogen .
(Bormann and Likens 所收集的數據顯示，砍除森林後對於保水力與保持土壤的養分
例如氮的能力會減少)
They came up with the following hypothesis,or tentative explanation for their data :When a forest is cleared,it retains less water and loses large quantities of its soil nutrients when water from rain and melting snow flows across its exposed soil.
(對於他們所得的數據他們提出了以下的假說或暫定解釋:當一座森林被砍除時，雨水和融化的冰雪流通在沒有遮蔽表土，土地只能保住較少的水分和失去大量的養分。)